For generations, artists and science-fiction writers have imagined alien landscapes beneath twin sunsets. The image became ...

The moment of first contact with extraterrestrials is a staple of science fiction. It usually involves a frantic scientist ...

Scientists have updated global guidelines for announcing possible evidence of intelligent alien life, aiming to prevent ...

When a hunk of ice from another star system hurtles through our cosmic neighborhood, astronomers pay attention. When that same hunk of ice starts blasting out enough water to fill 70 Olympic swimming ...

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for ...